#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

int main() {
  int a;
  cin >> a;
  int taken = (double)a * 60 / 100;
  int h = 10 + taken / 60;
  int m = taken % 60;
  string h_ = to_string(h);
  string m_ = to_string(m);
  cout << string(2 - h_.length(), '0') + h_ << ":" << string(2 - m_.length(), '0') + m_ << '\n';
  return 0;
}